92 elements occur naturally.
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The approximate speed of sound is about 761 mph or 335.28 meters/second.
<h3>What's the approximate speed of sound?</h3>
If we consider the normal atmosphere at sea level, the speed of sound is about 761 mph or 335.28 meters/second. The speed of sound is different in different mediums such as solid and liquid.
So we can conclude that the approximate speed of sound is about 761 mph or 335.28 meters/second.
Learn more about speed here: brainly.com/question/4931057
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Answer:
<em>El automovilista recorrió 92.315 metros</em>
Explanation:
<u>Movimiento Uniformemente Acelerado</u>
Ocurre cuando la rapidez de un móvil cambia en cantidades iguales en tiempos iguales. El cambio de velocidad por unidad de tiempo es llamado aceleración.
Siendo vo la rapidez inicial del móvil, vf su velocidad final, y t el tiempo que tarda en variar la velocidad, la aceleración se calcula con la fórmula:
Por su parte, el móvil en su trayectoria recorre una distancia x dada por:
Datos: El automovilista lleva inicialmente una rapidez vo=30.5 m/s y la disminuye uniformemente con una aceleración (de frenado) de hasta reducir a vf=19.4 m/s.
Despejando el tiempo de la ecuación [1] y substituyéndolo en la [2], obtenemos la relación:
De donde podemos calcular x:
Reemplazando valores:
x = 92.315 m
El automovilista recorrió 92.315 metros
Answer:
a) t = 2.0 s, b) x_f = - 24.56 m, Δx = 16.56 m
Explanation:
This is an exercise in kinematics, the relationship of position and time is indicated
x = 5 t³ - 9t² -24 t - 8
a) ask when the velocity is zero
speed is defined by
v =
let's perform the derivative
v = 15 t² - 18t - 24
0 = 15 t² - 18t - 24
let's solve the quadratic equation
t =
t1 = -0.8 s
t2 = 2.0 s
the time has to be positive therefore the correct answer is t = 2.0 s
b) the position and distance traveled for a = 0
acceleration is defined by
a = dv / dt
a = 30 t - 18
a = 0
30 t = 18
t = 18/30
t = 0.6 s
we substitute this time in the expression of the position
x = 5 0.6³ - 9 0.6² - 24 0.6 - 8
x = 1.08 - 3.24 - 14.4 - 8
x = -24.56 m
we see that all the movement is in one dimension so the distance traveled is the change in position between t = 0 and t = 0.6 s
the position for t = 0
x₀ = -8 m
the position for t = 0.6 s
x_f = - 24.56 m
the distance
ΔX = x_f - x₀
Δx = | -24.56 -(-8) |
Δx = 16.56 m
Answer:
Explanation:
the cart motion will be backward motion for there is no action force generated via friction force which acts on the ground harness of the horse. thus the will be pulled backward by the cart.